Fuel system upgrades need help.

[buckwild27]

Need input on if I need to change out the fuel lines and return line regulator. I have a 2010 Sierra it came stock with a 4.8l flex fuel, I upgraded to the 430hp ls3 and changed the fuel pump to walbro 450, I'm running 60# injectors and a procharger supercharger D1-sc1 with 10# of boost. Motor didn't survive the dyno. So I'm replacing it with the lsx 376 B-15 and I'm not sure if the fuel system is going to be good enough for this setup. Hp I think will be around 550.

 

[CammedVmax]

It should make above 550 on 10# imo. But you will need a bigger feed line, -6 an or -8 would be more than enough. Then I would run a return style regulator and basically make your factory feed line into a return line. That's how I'm going to set mine up if I ever get to.


Sent from Tapashit

 

[buckwild27]

Ok. Can i just mount the regulator on the firewall for the return line or would it need to be at the tank like the factory one?

 

[CammedVmax]

You can mount it under the hood somewhere usually


Sent from Tapashit